# SDR UIEA2026030300076

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 3, 2026
- Submitted: March 4, 2026
- Operation: Air carrier
- Aircraft: [N486MC](https://openairdocs.org/aircraft/N486MC), registered now
- Make and model: Boeing 747-45EF
- Registry model: [Boeing 747-45EF](https://openairdocs.org/model/boeing-747-45ef) (OpenAirDocs)
- Aircraft serial: 30608
- Aircraft time: 109,433 hours, 19,451 cycles
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Cooling Fan
- Part number: 4100149C
- Part serial: 1275A
- Condition: Failed
- Location: Zone 100
- Stage of operation: NR
- How discovered: O
- Nature of condition: J, B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2026030300076

## Discrepancy

E/E COOLING SUPPLY FAN STATUS MSG,  ACCOMPANIED WITH ELECTRICAL BURNING ODOR IN THE FLT DECK.  R & R THE E/E COOLING SUPPLY FAN IAW AMM 21-58-01 & IPC 21-58-01-01, ITEM 200. E & E COOLING GROUND TEST PASSED IAW AMM 21-58-00.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.